diff --git a/src/Infrastructure/BotSharp.Abstraction/Conversations/IConversationService.cs b/src/Infrastructure/BotSharp.Abstraction/Conversations/IConversationService.cs
index 44e90d32..c475d6a5 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Conversations/IConversationService.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Conversations/IConversationService.cs
@@ -16,15 +16,12 @@ public interface IConversationService
     /// Send message to LLM
     /// </summary>
     /// <param name="agentId"></param>
-    /// <param name="channel"></param>
-    /// <param name="conversationId"></param>
     /// <param name="lastDalog"></param>
     /// <param name="onMessageReceived"></param>
     /// <param name="onFunctionExecuting">This delegate is useful when you want to report progress on UI</param>
     /// <param name="onFunctionExecuted">This delegate is useful when you want to report progress on UI</param>
     /// <returns></returns>
     Task<bool> SendMessage(string agentId,
-        string channel,
         RoleDialogModel lastDalog, 
         Func<RoleDialogModel, Task> onMessageReceived, 
         Func<RoleDialogModel, Task> onFunctionExecuting,
diff --git a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs
index b393edd8..adf84334 100644
--- a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs
+++ b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs
@@ -10,13 +10,12 @@ namespace BotSharp.Core.Conversations.Services;
 public partial class ConversationService
 {
     public async Task<bool> SendMessage(string agentId,
-        string channel,
         RoleDialogModel message,
         Func<RoleDialogModel, Task> onMessageReceived,
         Func<RoleDialogModel, Task> onFunctionExecuting,
         Func<RoleDialogModel, Task> onFunctionExecuted)
     {
-        var conversation = await GetConversationRecord(agentId, channel);
+        var conversation = await GetConversationRecord(agentId);
 
         var agentService = _services.GetRequiredService<IAgentService>();
         Agent agent = await agentService.LoadAgent(agentId);
@@ -70,13 +69,15 @@ public partial class ConversationService
         return true;
     }
 
-    private async Task<Conversation> GetConversationRecord(string agentId, string channel)
+    private async Task<Conversation> GetConversationRecord(string agentId)
     {
         var converation = await GetConversation(_conversationId);
 
         // Create conversation if this conversation does not exist
         if (converation == null)
         {
+            var state = _services.GetRequiredService<IConversationStateService>();
+            var channel = state.GetState("channel");
             var sess = new Conversation
             {
                 Id = _conversationId,
diff --git a/src/Infrastructure/BotSharp.Core/Evaluations/EvaluatingService.cs b/src/Infrastructure/BotSharp.Core/Evaluations/EvaluatingService.cs
index d8824c7a..75191edf 100644
--- a/src/Infrastructure/BotSharp.Core/Evaluations/EvaluatingService.cs
+++ b/src/Infrastructure/BotSharp.Core/Evaluations/EvaluatingService.cs
@@ -88,12 +88,14 @@ public class EvaluatingService : IEvaluatingService
     private async Task<RoleDialogModel> SendMessage(string agentId, string conversationId, string text)
     {
         var conv = _services.GetRequiredService<IConversationService>();
-        conv.SetConversationId(conversationId, new List<string>());
+        conv.SetConversationId(conversationId, new List<string>
+        {
+            $"channel={ConversationChannel.OpenAPI}"
+        });
 
         RoleDialogModel response = default;
 
         await conv.SendMessage(agentId,
-            ConversationChannel.OpenAPI,
             new RoleDialogModel(AgentRole.User, text),
             async msg => response = msg,
             fnExecuting => Task.CompletedTask,
diff --git a/src/Infrastructure/BotSharp.Core/Routing/RoutingService.cs b/src/Infrastructure/BotSharp.Core/Routing/RoutingService.cs
index 1516f867..5527f13f 100644
--- a/src/Infrastructure/BotSharp.Core/Routing/RoutingService.cs
+++ b/src/Infrastructure/BotSharp.Core/Routing/RoutingService.cs
@@ -143,8 +143,7 @@ public partial class RoutingService : IRoutingService
 
         // Filter agents by profile
         var state = _services.GetRequiredService<IConversationStateService>();
-        var conversation = db.GetConversation(state.GetConversationId());
-        var channel = conversation?.Channel;
+        var channel = state.GetState("channel");
         var specifiedProfile = agents.FirstOrDefault(x => x.Profiles.Contains(channel));
         if (specifiedProfile != null)
         {
diff --git a/src/Infrastructure/BotSharp.OpenAPI/Controllers/ConversationController.cs b/src/Infrastructure/BotSharp.OpenAPI/Controllers/ConversationController.cs
index b4d8a8e2..dde37482 100644
--- a/src/Infrastructure/BotSharp.OpenAPI/Controllers/ConversationController.cs
+++ b/src/Infrastructure/BotSharp.OpenAPI/Controllers/ConversationController.cs
@@ -1,3 +1,4 @@
+using BotSharp.Abstraction.Agents.Enums;
 using BotSharp.Abstraction.ApiAdapters;
 using BotSharp.Abstraction.Conversations.Enums;
 using BotSharp.Abstraction.Conversations.Models;
@@ -99,14 +100,15 @@ public class ConversationController : ControllerBase, IApiAdapter
     {
         var conv = _services.GetRequiredService<IConversationService>();
         conv.SetConversationId(conversationId, input.States);
-        conv.States.SetState("provider", input.Provider)
+        conv.States.SetState("channel", input.Channel)
+                   .SetState("provider", input.Provider)
                    .SetState("model", input.Model)
                    .SetState("temperature", input.Temperature)
                    .SetState("sampling_factor", input.SamplingFactor);
 
         var response = new ChatResponseModel();
-        var inputMsg = new RoleDialogModel("user", input.Text);
-        await conv.SendMessage(agentId, input.Channel, inputMsg,
+        var inputMsg = new RoleDialogModel(AgentRole.User, input.Text);
+        await conv.SendMessage(agentId, inputMsg,
             async msg =>
             {
                 response.Text = msg.Content;
diff --git a/src/Plugins/BotSharp.Plugin.ChatbotUI/ChatbotUiController.cs b/src/Plugins/BotSharp.Plugin.ChatbotUI/ChatbotUiController.cs
index 892d2894..5dd17606 100644
--- a/src/Plugins/BotSharp.Plugin.ChatbotUI/ChatbotUiController.cs
+++ b/src/Plugins/BotSharp.Plugin.ChatbotUI/ChatbotUiController.cs
@@ -76,13 +76,13 @@ public class ChatbotUiController : ControllerBase, IApiAdapter
 
         var conv = _services.GetRequiredService<IConversationService>();
         conv.SetConversationId(input.ConversationId, input.States);
-        conv.States.SetState("provider", input.Provider)
+        conv.States.SetState("channel", input.Channel)
+                   .SetState("provider", input.Provider)
                    .SetState("model", input.Model)
                    .SetState("temperature", input.Temperature)
                    .SetState("sampling_factor", input.SamplingFactor);
 
         var result = await conv.SendMessage(input.AgentId,
-            input.Channel,
             message, 
             async msg => 
                 await OnChunkReceived(outputStream, msg),
diff --git a/src/Plugins/BotSharp.Plugin.MetaMessenger/Services/MessageHandleService.cs b/src/Plugins/BotSharp.Plugin.MetaMessenger/Services/MessageHandleService.cs
index 6e84ec49..a11be86d 100644
--- a/src/Plugins/BotSharp.Plugin.MetaMessenger/Services/MessageHandleService.cs
+++ b/src/Plugins/BotSharp.Plugin.MetaMessenger/Services/MessageHandleService.cs
@@ -48,10 +48,13 @@ public class MessageHandleService
 
         // Go to LLM
         var conv = _services.GetRequiredService<IConversationService>();
-        conv.SetConversationId(sender, new List<string>());
+        conv.SetConversationId(sender, new List<string>
+        {
+            $"channel={ConversationChannel.Messenger}"
+        });
 
         var replies = new List<IRichMessage>();
-        var result = await conv.SendMessage(agentId, ConversationChannel.Messenger, 
+        var result = await conv.SendMessage(agentId,
             new RoleDialogModel(AgentRole.User, message), async msg =>
             {
                 if (msg.RichContent != null)
diff --git a/src/Plugins/BotSharp.Plugin.Twilio/Controllers/TwilioVoiceController.cs b/src/Plugins/BotSharp.Plugin.Twilio/Controllers/TwilioVoiceController.cs
index 85b75834..ec2cd1a4 100644
--- a/src/Plugins/BotSharp.Plugin.Twilio/Controllers/TwilioVoiceController.cs
+++ b/src/Plugins/BotSharp.Plugin.Twilio/Controllers/TwilioVoiceController.cs
@@ -47,13 +47,13 @@ public class TwilioVoiceController : TwilioController
         var conv = _services.GetRequiredService<IConversationService>();
         conv.SetConversationId(sessionId, new List<string>
         {
+            $"channel={ConversationChannel.Phone}",
             $"calling_phone={input.DialCallSid}"
         });
 
         VoiceResponse response = default;
 
         var result = await conv.SendMessage(agentId,
-            ConversationChannel.Phone,
             new RoleDialogModel(AgentRole.User, input.SpeechResult),
             async msg =>
             {